Name : MIYATAKE,  Takashi
            Position : Associate Professor
            Division/Center : Division of Monitoring and Computational Geoscience
            Research rea :  Earthquake Source Process ,  Strong Ground Motion
            homepage :  http://www.eri.u-tokyo.ac.jp/miyatake/miyatake.html
 
 
 
 
 

Research:

The following computer simulations by using parallel computer are my current research.

       Reconstruction of the dynamic rupture process of the earthquakes
       The rupture process for real earthquakes are infeered from waveforms inversion, and the distribution of kinematic parameterssuch as
       slip (or moment release) distribution, and rupture time distribution have been estimated and the database of these fault parameters
       are acumulated. On the other hand, in theoretical study, the controling factor of rupture process have found to be the heterogeneity of
       constitutive law. These two lines of studies have been connected quantitatively in my study. In my aproach, the one of the kinematic
       parameters, the slip distribution, are transfered to the stress distribution by solving static equilibrium equations. Conbined with
       another kinematic parameter, rupture time distribution, can helf the dynamic rupture simulation using crack model with fiexed rupture
       time. The distribution stress just before the rupture which is the good indicater of the strength, is estimated on the fault.
       Near-field strong ground motion using dynamic rupture model.
       If is not rare in Japan that the active potential fault is running benearth the urban city. Thus the study of near-source ground motion is
       realistic and important. The objectives of my research, are to solve (1) what controls the near-source-ground motion, (2) how the
       source parameters affects the spacial patterns of ground motion. We investigate the effect of fault parameters and also the
       heterogeneity of such parameters on　the strong ground motion.

 Publications:

T. Miyatake, Computer simulation of strong ground motion near the fault using dynamic modeling: Spatial pattern of the peak ground velocity vectors, Pure Appl. Geophys., 157, 11/12, 2063--2081, 2000.
 

Miyatake, T., and T. Inoue, Simulation of earthquake rupture processes and strong ground motion, ACES Inaugural workshop, Brisbane \& Noosa, QLD, Australia, Jan.31-Feb.4, 255--259, 1999.

Takashi Miyatake, Simulation of Earthquake Faulting Process and Strong Ground Motion, The 2nd ACES Workshop, Tokyo and Hakone, October 15-20, 296--300, 2000.

Takashi Miyatake, Strong Ground Motion Simulation using Dynamic Faulting Model, International Workshop on the Quantitative Prediction of Strong-motion and the Physics of Earthquake Sources, Tsukuba, October 23-25, 22--23, 2000.